appeared in the study qualitative behaviors of wave-breaking [1]}. It admits a wave of greatest height, as a peaked limiting form
of the travelling wave solution [2]}, \(u(x,t) = A\exp (-\frac{1}{2}\left| {x - \frac{4}{3}t} \right|)\) , where \(A\)  is an
arbitrary constant. It is not completely integrable [3]}.
